A motor includes a stator core that forms a magnetic path and has a plurality of tooth parts along a circumferential direction; a tooth provided in each tooth part to wind a coil there around; and an extension part alternated with the tooth part along a circumferential direction of the stator core, convexly extending to an inner radial direction. The system of the present invention also automatically determines, when each motor vehicle at a location enters or leaves the location or a particular area. An engaged convex portion is formed on the second side wall.